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Asmall business produces and sells balls. the fixed costs are $20 and each ball costs $4.32 to produce. each ball sells for $8.32. write the equations for the total cost, c, and the revenue, r, then use the graphing method to determine how many balls must be sold to break even.

What is the point of inflection for the function f(x)=2cos4x on the interval (0, pi/2)

If each bricks costs and he can only buy one brick how much will it cost him to get the material to put around the outside of his garden?